Boiler and boiler-furnace



(No Model.) 7

A. WHEELER. BOILER AND BOILER FURNACE.

No. 489,726. Patented Jan. 10, 1893.

UNrrEn EARL A. WHEELER, OF SHARON, PENNSYLVANIA.

BOILER AND BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 489,726, dated January10, 1893.

Application filed January 23, 1892. Serial No. 4 (N m -l To all whom itmay concern:

Be it known that I, EARL A. WHEELER, a citizen of the United States ofAmerica, residing at Sharon, in the county of Mercer and State ofPennsylvania, have invented certain new and useful Improvements inBoilers and Boiler-Furnaces, of which the following is a specification.

In an application filed in the United States Patent Office on the th dayof November, 1891, Serial No. 411,537 I have shown an improved form ofboiler located within the stack of a heating or puddling furnace whichenables me to utilize the heat of said furnace,

ordinarily wasted, to generate steam, and I also show means forgenerating steamin the boiler when the puddling or other furnace is notin action.

The present invention relates to the same idea of utilizing the Wasteheat of a puddling, heating or other furnace by locatinga steamgenerator in the stack thereof, but diifers from the former applicationin th at in the pres ent case two single furnaces are shown and aparticular arrangement of the generator in connection therewith toutilize the heat passing into the stacks.

In the accompanying drawings: Figure 1 represents a plan view of therear parts of two ordinary puddling or heating furnaces placed back toback provided with a gen erator in the stack space thereof. Fig. 2 is avertical sectional view of the rear part of a furnace. Fig. 3 is adetail of the stack pipe.

The furnaces shown are of ordinary construction and are representativeof any heating puddling or other furnace or stack where there is a largeamount of waste heat, sufficient to generate steam. As shown there aretwo of these furnaces placed back to back with the necks of the furnacesleading to the stacks parallel. These necks discharge the heat andproducts of combustion into the stack space and in the present case Ihave located in this space the upper and lower boilers of the improvedconstruction set forth in my United States Patent No. 465,303 ofDecember 15, 1891, which are connected by the series of water tubes a.The boilers while of the same construction as in the patent re ferred toare of a length sufficient to extend between the walls 12-47 of thestack space which inclose the stacks of both furnaces the heads of theboilers projecting outside said walls.

The boilers are indicated at A. They are connected by a series of watertubes at which extend between the upper and lower boilers. These tubesare not continuous throughout the stack but are interrupted by adivision wall B arranged centrally which separates the space into twochambers through which the boilers extend, the wall being built arou ndthe said boilers and serving as an intermediate support therefor. Thestack space formed by the walls 6, b, and c, o, and divided by the wallB is carried up above the line of the upper boiler at which point, thestacks are carried up separately the stack pipes being on one side ofthe upper boiler as at 1 Fig. 2 the other side of the boiler beingclosed by the brickwork 2. The pipes 1 are shown in dotted lines Fig. 1.The space around and between the stacks is closed by the plate 3. In theworking of a heating or puddling furnace the heat is regulated. andcontrolled by means of a damper in the stack, consequently each stackmust be separate and independ ent of the other, and hence the necessityof the partition wall separating the stacks. By this arrangement it willbe seen that the heat of the two furnaces is fullyntilized in a verysimple manner. In case however, but one of the furnaces is in action Iprovide for the heating of the other by a grate beneath it so that afire can be built under that end and thus all unequal expansion avoided.As one furnace may be fired at one time and the other at another time itis necessary to provide a grate 5 for each end of the boiler and thuswhen neither furnace is in action fires may be started in the grates oneach side if steam is needed at such a time. Thus I am enabled verysimply to utilize the heat from the two furnaces, Orfrom one and whenneither furnace is in action to still utilize the boiler as readily asif it stood alone.

I claim as my invention:

In combination With a pair of furnaces having independent heat exitopenings, an independent chamber in connection with each exit opening, ahorizontal boiler extending through both chambers, independent stackpipes'for the chambers and gtates beneath 16 the boiler, substantiallyas described.

In testimony whereof I afflx my signature in presence of two Witnesses.

EARL A. WVHEELER.

W itnesses:

G. W. SHILLING, A. W. WILLIAMS.

